Currently Being ModeratedMar 19, 2012 6:17 AM (in response to Thomas Carney)
The MacBook may not be able to provide the required amperage to charge it.
Currently Being ModeratedMar 19, 2012 6:19 AM (in response to Thomas Carney)
The USB port do not supply enough power to charge the iPad. Use the original charger that comes with the iPad.
Currently Being ModeratedMar 19, 2012 7:27 AM (in response to Thomas Carney)
The quickest way (and really the only way) to charge your iPad is with the included 10W USB Power Adapter. iPad will also charge, although more slowly, when attached to a computer with a high-power USB port (many recent Mac computers) or with an iPhone Power Adapter (5W). When attached to a computer via a standard USB port (most PCs or older Mac computers) iPad will charge very slowly (but iPad indicates not charging). Make sure your computer is on while charging iPad via USB. If iPad is connected to a computer that’s turned off or is in sleep or standby mode, the iPad battery will continue to drain.
Apple recommends that once a month you let the iPad fully discharge & then recharge to 100%.
At this link http://www.tomshardware.com/reviews/galaxy-tab-android-tablet,3014-11.html , tests show that the iPad 2 battery will charge to 90% in 3 hours 1 minute. It will charge to 100% in 4 hours 2 minutes.
Currently Being ModeratedMar 19, 2012 8:56 AM (in response to Texas Mac Man)
Thanks to all of you! That cleared up my question.
Now, if we can only get the thing to recharge at a rate greater than 10% per hour. Ha!
Currently Being ModeratedMar 19, 2012 9:05 AM (in response to Thomas Carney)
None of the iPads (Including the original one I think, please correct me if I'm wrong) will charge through a USB port. They simply don't put out enough amperage. The comments about using the 10 Watt wall charger are correct. In a pinch you can use the wall charger from an iPhone/iPod but because the iPad pulls so many amps you will want to keep an eye on the charger and not just let it sit connected. I left my iPad 2 plugged into my iPhone charger for about 40 minutes and discoverd that the charger had gotten so hot I could barely touch it. So no more than 15 minutes at a stretch and then allow the wall charger to cool back down seems to be about the max.
This is not a recommendation but a simple work around if you need to get some charge back into your iPad.
The good news is that once charged the iPad doesn't seem to burn through the battery the way my iPhone does. So I can go quite a while on even a quarter charge.